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HIGH-RISK SCAM AREA CODE
Missed-call callback scam
Threat Rating
9.8 / 10
Territory / Origin:Montserrat (Non-US Caribbean / International)
Scam Mechanism:Same missed-call pattern as other former-809 territories.
Evidence Status:Only appears in the original 1990s split announcement; absent from every 2013+ scam-warning list reviewed
Split History:Split from 809, effective July 1, 1996 (confirmed date, per AT&T's own effective-date table).
Phone Safety Tip:
Do not return missed calls from unknown +664 numbers. Callers are billed high per-minute international rates on your mobile invoice.
In-Depth Analysis: Missed-call callback scam
Area code 664 is designated for Montserrat within the North American Numbering Plan. While it dials identically to a standard domestic US phone number, calls placed to +1 (664) are routed internationally.
Key Threat Highlights:
- Scam Classification: Missed-call callback scam
- Attack Vector: Same missed-call pattern as other former-809 territories.
- First Identified: 2000s
- Recency & Status: Only appears in the original 1990s split announcement; absent from every 2013+ scam-warning list reviewed
Why Scammers Prefer Area Code 664
Fraudsters leverage consumer unfamiliarity with Caribbean area codes. Because numbers in Montserrat start with +1, mobile devices do not display standard international warning alerts or require international dialing codes like 011. Victims assume they are returning a standard domestic call until their carrier bill arrives with premium rate international charges.
What to Do If You Called Area Code 664
- Hang up immediately: Disconnect the call as quickly as possible to minimize per-minute charges.
- Contact your phone carrier: Report the suspicious call immediately and inquire about disputing fraudulent premium charges.
- Block the number: Add the specific number to your device's blocked caller list.
- Report to authorities: File a complaint with the Federal Communications Commission (FCC) or Federal Trade Commission (FTC).